Continuous crude indium extraction device

Abstract

The invention relates to the technical field of metallurgy and chemical industry, and provides a continuous crude indium extraction device which comprises a tank body with an extraction cavity, and a spraying unit, an aluminum plate assembly and a filtering unit are sequentially arranged in the tank body from top to bottom. The side wall of the tank body is provided with a feed liquid inlet, the bottom of the tank body is provided with a conical slag outlet, the spraying unit is used for spraying organic phase fog drops to the aluminum plate assembly, and the aluminum plate assembly is used for providing a replacement reaction interface. A stirring shaft arranged in the axial direction of the tank body and a first driving part for driving the stirring shaft to rotate are further arranged in the tank body, stirring blades are arranged on the stirring shaft and are arranged between the spraying unit and the aluminum plate assembly, and the filtering unit is used for intercepting solid particles generated by reaction. According to the method, complexing and replacement reactions are promoted, the indium extraction efficiency in unit time is remarkably improved, the continuity of the whole process is guaranteed, online slag removal is achieved, and the indium extraction efficiency is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of metallurgical and chemical technology, and in particular to a continuous crude indium extraction device. Background Technology

[0002] Indium is an important rare and dispersed metal widely used in electronics, semiconductors, aerospace, and other fields. The extraction of crude indium typically employs an extraction process, where an extractant reacts with the crude indium feedstock to separate indium from other impurity metals.

[0003] In existing technologies, crude indium extraction often employs batch extraction devices. This process involves adding the feed liquid and extractant in a single batch for mixing and extraction, followed by phase separation before proceeding to the next batch. This method results in low production efficiency, and each slag removal operation requires shutdown, severely impacting production continuity. In traditional devices, the mixing of the organic phase and crude indium feed liquid relies primarily on mechanical stirring by a paddle, leading to poor mixing uniformity. Organic phase droplets easily aggregate into large droplets, resulting in a small contact area between the two phases, insufficient indium ion complexation reaction, and generally low extraction efficiency, with the first-stage extraction rate typically being insufficient.

[0004] Secondly, in the existing extraction devices, aluminum plates generate solid residues such as aluminum oxides during the reaction process. These residues tend to adhere to the surface of the aluminum plates and the inner wall of the device. If they are not cleaned in time, they will block the flow channels of the liquid and reduce the reactivity of the aluminum plates. The existing cleaning methods mostly involve manual cleaning when the machine is stopped, which cannot achieve real-time online cleaning. Summary of the Invention

[0005] In view of this, the present invention aims to propose a continuous crude indium extraction device to improve the indium extraction efficiency per unit time, ensure the continuity of the entire process, realize online slag removal, and ensure indium extraction efficiency.

[0006] To achieve the above objectives, the technical solution of the present invention is implemented as follows: A continuous crude indium extraction device includes a tank with an extraction chamber, wherein a spray unit, an aluminum plate assembly and a filter unit are arranged sequentially from top to bottom inside the tank. The tank body has a liquid inlet on its side wall and a conical slag outlet at its bottom. The spray unit is used to spray organic phase droplets onto the aluminum plate assembly, and the aluminum plate assembly provides a displacement reaction interface. The tank body is also provided with a stirring shaft arranged along its axial direction and a first driving part for driving the stirring shaft to rotate. The stirring shaft is provided with stirring blades, which are located between the spray unit and the aluminum plate assembly. The filtration unit is used to intercept solid particles produced by the reaction.

[0007] Furthermore, the tank is provided with a first blocking plate arranged radially therein, the cavity at the upper part of the first blocking plate is the reaction zone, and the cavity at the lower part of the first blocking plate is the filtration zone; The reaction area is provided with a reaction cylinder spaced apart from the tank body. The reaction cylinder abuts against the first blocking plate. A cavity with an open top is formed inside the reaction cylinder. A liquid inlet space is formed between the reaction cylinder and the tank body. The bottom of the reaction cylinder is formed with several conical holes, and the liquid inlet is connected to the liquid inlet space.

[0008] Furthermore, the reaction cylinder is formed with an inwardly recessed spiral groove, which spirals upwards to the top. The liquid material gradually rises from the bottom of the reaction cylinder to the top of the reaction cylinder until the aluminum plate assembly is in the liquid material.

[0009] Furthermore, the stirring shaft includes a drive shaft connected to the power output end of the first drive unit, and a bushing pivotally connected to the outside of the drive shaft. The aluminum plate assembly includes a support plate sleeved on the outside of the bushing, an aluminum plate connected to the upper part of the support plate and in a fan shape, and a plurality of the aluminum plates are evenly distributed around the outside of the drive shaft. The thickness of the aluminum plate varies in a wedge shape along its radial direction, so that some of the aluminum plates have a corrugated structure.

[0010] Furthermore, the aluminum plate has a contoured opening, and a first scraper communicating with the drive shaft is provided inside the opening; A second scraper is also provided above the aluminum plate, and the second scraper is elastically connected above the aluminum plate by a connecting component.

[0011] Furthermore, a fixing plate is also connected to the drive shaft. The fixing plate extends radially along the support plate and is disposed above the aluminum plate. Two abutting shafts are respectively provided at both ends of the fixing plate. An elastic element is sleeved on the abutting shaft. The abutting shaft includes a limiting section, a main body section and a pressing section located above the aluminum plate. The elastic element is disposed between the pressing section and the fixed plate, and the diameter of the pressing section is larger than the maximum diameter of the elastic element; A second scraper is connected between the two pressure sections.

[0012] Furthermore, the spraying unit includes a ring-shaped mounting bracket connected to the tank body, a drive assembly disposed within the mounting bracket, and a plurality of atomizing nozzles disposed at the output end of the drive assembly. While the driving component drives the plurality of atomizing nozzles to reciprocate radially along the aluminum plate, the atomizing nozzles oscillate and spray. The mounting bracket is also equipped with an annular spray pipe, which is connected to the atomizing nozzle.

[0013] Furthermore, the drive assembly includes a fixed base connected within the mounting bracket, a turntable pivotally connected within the fixed base, a second drive unit connected to the mounting bracket, and a linkage assembly connected to the power output end of the second drive unit, the linkage assembly being pivotally connected to the turntable; The atomizing nozzle is slidably connected to the fixed base, the second driving unit drives the turntable to rotate, and the plurality of atomizing nozzles move radially along the tank body.

[0014] Furthermore, the fixed base is formed with a plurality of sliding grooves, a sliding block is provided in the sliding groove, and an extension plate is provided below the sliding block; The extension plate is connected to a nozzle mounting part, and the atomizing nozzle is connected to the nozzle mounting part.

[0015] Furthermore, the nozzle mounting part includes a mounting plate, a bearing connected to the mounting plate, and a connecting rod connected to the bearing. The atomizing nozzle is connected to one end of the connecting rod, and a lever is also connected to the connecting rod. The turntable is connected to the connecting rod assembly by a pin. The bottom of the mounting frame is also provided with a pivotally connected drive disk. The drive disk is connected to the pin. The mounting frame is also provided with a limiting member to support the drive disk. Several limiting members restrict the displacement of the drive disk. When the pin rotates, the drive disc rotates accordingly, and the connecting rod swings relative to the mounting plate.

[0016] Compared with the prior art, the present invention has the following advantages: The continuous crude indium extraction device of this invention forms organic phase droplets through a spray unit, significantly increasing the contact area with the feed liquid. A stirring shaft drives a rotating impeller positioned between the spray unit and the aluminum plate assembly, promoting mixing and mass transfer between the feed liquid and the organic phase droplets, facilitating complexation and displacement reactions, significantly improving indium extraction efficiency per unit time, ensuring the continuity of the entire process, and enabling online slag removal to guarantee indium extraction efficiency. Simultaneously, a filter unit is installed below the reaction zone to effectively prevent solid particles from accumulating or clogging the system, reducing the load on subsequent solid-liquid separation and the difficulty of waste residue treatment, and lowering the risk of pipeline and equipment blockage. Attached Figure Description

[0017] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1This is a schematic diagram of the continuous crude indium extraction device according to an embodiment of the present invention; Figure 2 This is a three-dimensional schematic diagram of the aluminum plate assembly described in an embodiment of the present invention; Figure 3 This is a first-view perspective perspective of the spray unit described in an embodiment of the present invention; Figure 4 This is a two-dimensional schematic diagram of the spray unit described in an embodiment of the present invention from a second perspective; Figure 5 This is a three-dimensional schematic diagram of the atomizing nozzle described in an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Tank body; 2. Spray unit; 3. Aluminum plate assembly; 4. Filter unit; 5. Stirring shaft; 6. First drive unit; 7. Stirring blade; 8. Reaction cylinder; 9. First blocking plate; 10. Second blocking plate; 11. Conical slag discharge port; 12. Liquid feed port; 13. Third drive unit; 14. First gear; 15. Second gear; 16. Sealing plate; 17. Fourth drive unit; Filtering area; 201. Mounting bracket; 202. Atomizing nozzle; 203. Spray pipe; 204. Drive assembly; 205. Drive disc; 206. Mounting plate; 207. Connecting rod; 208. Lever; 209. Pin; 210. Limiting component; 211. Bearing; 212. Sliding block; 301. Support plate; 302. Aluminum plate; 303. First scraper; 304. Second scraper; 305. Fixing plate; 306. Abutment shaft; 307. Elastic element; 401. Filter screen; 402. Filter element; 501. Drive shaft; 502. Bushing; 801, spiral groove; 2041, Fixed base; 2042, Linkage assembly; 2043, Turntable; 2044, Second drive unit; 20411, Sliding groove; 20431, Arc-shaped groove. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0020] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "back," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] Furthermore, in the description of this invention, unless otherwise explicitly defined, the terms "installation," "connection," "linking," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention in light of the specific circumstances.

[0022] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] This embodiment relates to a continuous crude indium extraction device, the overall structure of which is as follows: Figure 1 As shown, the device includes a tank 1 with an extraction chamber. Inside the tank 1, from top to bottom, are a spray unit 2, an aluminum plate assembly 3, and a filter unit 4. The tank 1 has a feed inlet 12 on its side wall and a conical slag outlet 11 at its bottom. The spray unit 2 sprays organic phase droplets onto the aluminum plate assembly 3, which provides the displacement reaction interface. The tank 1 also contains a stirring shaft 5 arranged axially and a first drive unit 6 that drives the stirring shaft 5 to rotate. The stirring shaft 5 has stirring blades 7 positioned between the spray unit 2 and the aluminum plate assembly 3. The filter unit 4 intercepts solid particles generated during the reaction.

[0024] Based on the above design concept, the continuous crude indium extraction device in this embodiment forms organic phase droplets through the spray unit 2, significantly increasing the contact area with the feed liquid. A stirring shaft 5 drives the paddles to rotate, positioned between the spray unit 2 and the aluminum plate assembly 3. This promotes mixing and mass transfer between the feed liquid and the organic phase droplets, facilitating complexation and displacement reactions, significantly improving the indium extraction efficiency per unit time, and ensuring the continuity of the entire process. Simultaneously, a filter unit 4 is installed below the reaction zone to effectively prevent solid particles from accumulating or clogging the system, reducing the load on subsequent solid-liquid separation and the difficulty of waste residue treatment, and lowering the risk of pipe and equipment blockage.

[0025] Based on the above overall description, this embodiment presents an exemplary structure of the continuous crude indium extraction device, such as... Figure 1As shown, this device is used in the crude indium extraction and purification process. It is located after the leaching and purification process and performs the extraction process on crude indium. The extraction function is achieved by spraying the organic phase, and the aluminum plate assembly 3 completes the displacement reaction with the liquid.

[0026] In traditional processes, the purified raw materials require an extraction process to transfer indium from the aqueous phase to the organic phase, a back-extraction process to transfer indium from the organic phase to a new aqueous phase, and finally, the reduction of indium from the aqueous phase to the metal, ultimately yielding solid indium. This device omits the back-extraction process. Electrons provided by the aluminum plate 302 directly reduce the indium ions in the organic phase, i.e., the indium ions in the indium complex, reducing the complexation reaction that just occurred at the interface between the organic and aqueous phases. The specific formula is as follows: In complex + Al → In + Al 3+ +Extractant; The path of indium from the aqueous phase of the feed solution to metallic indium is shortened, saving the intermediate recycling process of indium entering the organic phase and then entering the aqueous phase of the back-extraction. After the extractant releases indium near the In complex, it is immediately used for extraction, eliminating the need to prepare and use large amounts of back-extraction agent. This significantly reduces the generation of acidic back-extraction wastewater and is beneficial to environmental protection.

[0027] The indium-containing liquid and the regenerated organic phase from this device continuously enter tank 1. Under the action of stirring and spraying, an extraction and displacement reaction occurs in the reaction zone. The reaction product enters the filtration zone 101 for filtration. After filtration for a certain period of time, the sponge indium solid particles are backwashed to the bottom of the cone to form a high-concentration slurry, which is then periodically discharged. The collected indium-enriched slurry is washed, dried, and then fed into a vacuum melting furnace for casting to obtain crude indium ingots. The mixture of organic phase and liquid flows into the subsequent settling and stratification tank. Due to the density difference, the regenerated organic phase accumulates in the upper layer, while the raffinate is in the lower layer. The regenerated organic phase is returned to the spray unit 2 for recycling, and the raffinate in the lower layer is discharged as wastewater.

[0028] As a preferred embodiment, such as Figures 1 to 3 As shown, the tank body 1 is provided with a first blocking plate 9 arranged radially therein. The cavity above the first blocking plate 9 is the reaction zone, and the cavity below the first blocking plate 9 is the filtration zone 101. The reaction zone is provided with a reaction cylinder 8 spaced apart from the tank body 1. The reaction cylinder 8 abuts against the first blocking plate 9. The reaction cylinder 8 has a cavity with an open top, and the space between the reaction cylinder 8 and the tank body 1 is formed as a liquid inlet space. The bottom of the reaction cylinder 8 has several conical holes, and the liquid inlet 12 communicates with the liquid inlet space.

[0029] like Figure 1As shown, the upper part of the first blocking plate 9 is the reaction zone, and the lower part is the filtration zone 101. A second blocking plate 10 is spaced below the first blocking plate 9. A filter screen 401 arranged along the diameter of the extraction chamber is located between the first blocking plate 9 and the second blocking plate 10. The second blocking plate 10 and the tank body 1 form an inverted conical cavity for housing the second layer filter element 402 of the filtration unit 4. The first blocking plate 9 has several arrayed through holes to allow the reacted liquid to enter the filtration zone 101. A sealing plate 16 is also provided below the first blocking plate 9. Below the sealing plate 16 is a fourth driving unit 17 that drives its rotation. The fourth driving unit 17 is a motor. The sealing plate 16 has a rectangular structure. After a predetermined reaction time, the motor rotates, causing the sealing plate 16 to deviate, so that the through holes communicate with the filtration zone 101, facilitating the flow of the reaction solution.

[0030] In practice, filter screen 401 is made of stainless steel, resistant to sulfuric acid corrosion, with a mesh size of 80-120 mesh, preferably 100 mesh. For ease of installation and maintenance, it employs a planar mesh structure composed of multiple fan-shaped panels. It is primarily used to intercept larger sponge indium aggregates detached from the reaction zone, or byproducts of the aluminum plate 302 reaction, such as aluminum hydroxide flocs, as well as incompletely dissolved impurities with particles larger than 150 μm. These particles preferentially settle and accumulate on the surface of filter screen 401, intercepting most of the solid particles and reducing the load on the second-stage fine filtration.

[0031] like Figure 1 As shown, multiple filter elements 402 arranged in an array are arranged below the second blocking plate 10. Specifically, wedge-shaped wire-wound filter elements 402 are used, which can precisely control the gap and are easy to backwash. Its filtration accuracy is 20~50μm, which is used to capture fine indium powder, colloidal impurities, and extremely fine precipitates generated in chemical reactions, so as to ensure that the liquid flowing out of the device is clear and can be directly returned to the upstream process or sent to the subsequent wastewater treatment section, avoiding blockage of pipes and pumps.

[0032] As a preferred embodiment, such as Figures 1 to 2 As shown, the reaction cylinder 8 has an inwardly recessed spiral groove 801 formed inside. The spiral groove 801 spirals upwards to the top, allowing the liquid to gradually rise from the bottom of the reaction cylinder 8 to the top until the aluminum plate assembly 3 is submerged in the liquid. In this embodiment, the tank 1 is a rotary cylindrical structure, and the reaction cylinder 8 is also cylindrical and coaxially arranged with the tank 1. The reaction cylinder 8 is fixed above the first blocking plate 9 by welding. The spiral groove 801, with its spiral path rising, is provided inside the reaction cylinder 8, allowing the liquid to enter from the inlet and first reach the bottom of the reaction cylinder 8. It then enters the inner cavity of the reaction cylinder 8 through the flow hole. As the liquid gradually enters the reaction cylinder 8, the spiral groove 801 can guide a portion of the liquid. Combined with the stirring of the agitator blade 7, the liquid can form a predetermined rotational trend, facilitating the complexation and displacement reactions of indium and promoting interfacial reactions.

[0033] Furthermore, such as Figures 1 to 2 As shown, the stirring shaft 5 includes a drive shaft 501 connected to the power output end of the first drive unit 6, and a bushing 502 pivotally connected to the outside of the drive shaft 501. The aluminum plate assembly 3 includes a support plate 301 sleeved on the outside of the bushing 502, and a fan-shaped aluminum plate 302 connected to the upper part of the support plate 301. Several aluminum plates 302 are evenly distributed around the outside of the drive shaft 501, and the thickness of the aluminum plates 302 varies in a wedge shape along its radial direction to make the aluminum plates 302 have a corrugated structure.

[0034] In this embodiment, the first drive unit 6 is located below the second blocking plate 10 and is sealed by a sealing cover to prevent the first drive unit 6 from being corroded by liquid. The first drive unit 6 is a servo motor, which drives the drive shaft 501 and the stirring blade 7 to rotate. In this embodiment, the bottom of the bushing 502 is also provided with a first gear 14, and a third drive unit 13 is provided on one side of the first drive unit 6. The power output end of the third drive unit 13 is connected to a second gear 15. The first gear 14 and the second gear 15 are connected by a belt. A receiving cavity is provided in the second blocking plate 10, and the first gear 14, the second gear 15, and the belt are all placed in the receiving cavity and then sealed by a maintenance cover to prevent the mechanical parts from being corroded by the liquid and to facilitate assembly and disassembly. Furthermore, both the bushing 502 and the drive shaft 501 need to be treated with anti-corrosion measures to increase the service life of the equipment.

[0035] like Figure 1 As shown, the bushing 502 is driven to rotate by the third drive unit 13. When the spraying unit 2 is spraying, the aluminum plate assembly 3 is stationary, facilitating the complexation reaction between the organic phase spray and the aluminum plate 302. When the stirring blade 7 rotates, the aluminum plate assembly 3 can move in the opposite direction or remain stationary, allowing the liquid to undergo a displacement reaction with the aluminum plate assembly 3. This device achieves different operating modes by controlling the coordinated action of the first drive unit 6 and the third drive unit 13: First, in the spraying and extraction stage, spraying unit 2 is activated to spray organic phase droplets into the reaction zone. At this time, the third drive unit 13 is not operating, and the bushing 502 and aluminum plate assembly 3 remain stationary. The organic phase droplets and the feed liquid are fully mixed under the rotation of the stirring blades 7, and a complexation extraction reaction occurs at the two-phase interface, where indium ions transfer from the aqueous phase to the organic phase. The main reactions are as follows: Complexation extraction reactions occurring at the interface between the organic and aqueous phases: ; In this context, (HA)2 represents the dimerized P204 extractant molecule, the subscript (aq) represents the aqueous phase, and (org) represents the organic phase.

[0036] Secondly, during the stirring and displacement stage, while the spraying stops or continues, the first drive unit 6 drives the stirring blades 7 to rotate, causing intense mixing of the fluid in the reaction zone. At this time, the third drive unit 13 activates, driving the bushing 502 and the aluminum plate assembly 3 to rotate slowly. The rotation direction can be opposite to the rotation direction of the stirring blades 7 to increase the relative velocity between the surface of the aluminum plate 302 and the fluid. The indium-loaded organic phase or indium complex near the interface comes into contact with the surface of the aluminum plate 302 under fluid transport, undergoing a displacement reduction reaction. Indium is deposited on the surface of the aluminum plate 302 in metallic form and is promptly scraped off by the scraper. The main reactions are as follows: Displacement-reduction reaction occurring on the surface of aluminum plate 302: ; As mentioned above, by independently controlling the movement of the stirring blade 7 and the aluminum plate assembly 3, the hydrodynamic conditions at different stages can be optimized. When the aluminum plate 302 is stationary during spraying, it is conducive to the uniform distribution and mixing of organic phase droplets. During displacement, the aluminum plate 302 moves in the opposite direction to the stirring, which can enhance the mass transfer on the surface of the aluminum plate 302 and promote the shedding of deposited indium.

[0037] like Figure 2 As shown, the fan-shaped aluminum plate 302 in aluminum plate assembly 3 forms a corrugated structure, which can generate multi-directional shear and pushing forces on the mixture of crude indium liquid and organic phase during stirring, breaking the laminar flow state and achieving better mixing and mass transfer, thus improving the efficiency of complexation and displacement reactions. Simultaneously, the corrugated aluminum plate 302 increases the reaction contact area, enabling it to adsorb and carry some reaction products, promoting a complete reaction and increasing the extraction rate of crude indium.

[0038] Furthermore, such as Figures 1 to 2 As shown, the aluminum plate 302 has a contoured opening. A first scraper 303, connected to the drive shaft 501, is located within the opening. A second scraper 304 is also located above the aluminum plate 302, elastically connected to it via a connecting assembly. The first scraper 303 scrapes away reactants adhering to the inner wall of the aluminum plate 302 and within the opening, preventing the accumulation of reaction products from affecting the reaction contact area and heat and mass transfer efficiency of the aluminum plate 302, thus ensuring the continuous and efficient extraction reaction. Figure 1 As shown, the upper surface of the scraper is provided with several flow holes. Part of the mixed solution enters the inner wall of the aluminum plate 302 to react. By utilizing the inner wall area of ​​the aluminum plate 302, the reaction area is increased, thereby improving the efficiency of indium extraction.

[0039] A through hole is provided on the bottom plate of aluminum plate 302, and a cavity is formed in the support plate 301. Part of the solution in aluminum plate 302 flows into the cavity through the through hole and flows into the bushing 502. The bushing 502 is provided with a flow channel that communicates with the filtration area 101, and the solution outlet is located above the filter screen 401.

[0040] Furthermore, by setting a second scraper 304, the material and reaction products attached to the outer surface of the aluminum plate 302 are scraped off. The flexible connection adapts to the shape of the aluminum plate 302, ensuring the scraping effect, avoiding excessive wear of the aluminum plate 302, ensuring that the crude indium extraction efficiency is not reduced due to the covering of a large amount of reactants, and reducing the impact of impurity residues on the extraction purity.

[0041] Furthermore, such as Figure 1 and Figure 2 As shown, a fixed plate 305 is also connected to the drive shaft 501. The fixed plate 305 extends radially along the support plate 301 and is positioned above the aluminum plate 302. Two abutment shafts 306 are respectively provided at both ends of the fixed plate 305. An elastic element 307 is sleeved on the abutment shaft 306. The abutment shaft 306 includes a limiting section, a main body section, and a pressing section located above the aluminum plate 302. The elastic element 307 is located between the pressing section and the fixed plate 305. The diameter of the pressing section is larger than the maximum diameter of the elastic element 307. A second scraper 304 is connected between the two pressing sections. The elastic element 307 uses a telescopic spring to provide stable and buffered mounting support for the second scraper 304. This arrangement allows for real-time cleaning of the surface of the aluminum plate 302 without affecting the stirring reaction, preventing the reaction product components from accumulating into a thick layer, ensuring the continuous and efficient progress of the crude indium extraction reaction, and improving extraction efficiency and purity.

[0042] As a preferred embodiment, such as Figures 3 to 4 As shown, the spray unit 2 includes a ring-shaped mounting bracket 201 connected inside the tank 1, a drive assembly 204 disposed within the mounting bracket 201, and a plurality of atomizing nozzles 202 disposed at the output end of the drive assembly 204. While the drive assembly 204 drives the plurality of atomizing nozzles 202 to reciprocate radially along the aluminum plate 302, the atomizing nozzles 202 oscillate and spray. The mounting bracket 201 is also provided with a ring-shaped spray pipe 203, which communicates with the atomizing nozzles 202.

[0043] Furthermore, such as Figure 3 and Figure 4 As shown, the drive assembly 204 includes a fixed base 2041 connected within the mounting bracket 201, a turntable 2043 pivotally connected within the fixed base 2041, a second drive unit 2044 connected to the mounting bracket 201, and a linkage assembly 2042 connected to the power output end of the second drive unit 2044, the linkage assembly 2042 being pivotally connected to the turntable 2043. Atomizing nozzles 202 are slidably connected to the fixed base 2041. The second drive unit 2044 drives the turntable 2043 to rotate, and a plurality of atomizing nozzles 202 move radially along the tank body 1.

[0044] Preferably, the fixed base 2041 has a plurality of sliding grooves 20411 formed therein, and a sliding block 212 is provided in the sliding groove 20411. An extension plate is provided below the sliding block 212. The extension plate is connected to the nozzle mounting part, and the atomizing nozzle 202 is connected to the nozzle mounting part.

[0045] Furthermore, such as Figure 3 and Figure 4 As shown, the nozzle mounting section includes a mounting plate 206, a bearing 211 connected to the mounting plate 206, and a connecting rod 207 connected to the bearing 211. An atomizing nozzle 202 is connected to one end of the connecting rod 207, and a lever 208 is also connected to the upper connecting rod 207. A turntable 2043 and a connecting rod assembly 2042 are connected via a pin 209. A pivotally connected drive disc 205 is also provided at the bottom of the mounting frame 201, connected to the pin 209. The mounting frame 201 also has limiting members 210 supporting the drive disc 205, with several limiting members 210 restricting the displacement of the drive disc 205. When the pin 209 rotates, the drive disc 205 rotates accordingly, and the connecting rod 207 swings relative to the mounting plate 206.

[0046] like Figure 5 As shown, the bearing 211 adopts a diamond-shaped bearing 211 seat, and the connecting rod 207 is inserted in the center of the bearing 211 seat in an L-shape. One end of the connecting rod 207 is equipped with an atomizing nozzle 202, and the other end is connected to the spray pipe 203 mentioned above through a hose to achieve real-time spraying.

[0047] like Figure 3 and Figure 4 As shown, the second drive unit 2044 employs a telescopic cylinder. The second drive unit 2044 drives the connecting rod assembly 2042 to move, thereby driving the turntable 2043 to rotate reciprocally. The turntable 2043 has several arc-shaped grooves 20431 extending radially along it. The sliding block 212 has guide rods extending into the arc-shaped grooves 20431. When the turntable 2043 rotates, the guide rods move along the arc-shaped grooves 20431, causing the sliding block 212 to slide reciprocally within the sliding grooves 20411. This arrangement increases the spray area of ​​the atomizing nozzle 202, achieving a uniform spray effect covering the entire aluminum plate assembly 3 and improving the efficiency of indium extraction.

[0048] In this embodiment, the spray unit 2 rotates together with the connecting rod assembly 2042 via the drive disk 205, driving the lever 208 to rotate and causing the atomizing nozzle 202 to swing back and forth. Through radial movement and swinging motion, the atomizing nozzle 202 can achieve a uniform spraying effect without dead angles during the spraying process, and meet the requirements of crude indium extraction equipment for tanks 1 and aluminum plate assemblies 3 of different specifications. It ensures uniform contact between organic phase droplets and crude indium liquid, promotes more complete reaction between the two, significantly improves indium extraction efficiency, and adapts to the needs of continuous extraction processes.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A continuous crude indium extraction apparatus, characterized in that: It includes a tank (1) with an extraction chamber, and a spray unit (2), an aluminum plate assembly (3) and a filter unit (4) are arranged sequentially from top to bottom inside the tank (1). The tank (1) has a liquid inlet (12) on its side wall and a conical slag outlet (11) at its bottom. The spray unit (2) is used to spray organic phase droplets onto the aluminum plate assembly (3). The aluminum plate assembly (3) provides a displacement reaction interface. The tank (1) is also provided with a stirring shaft (5) arranged along its axial direction and a first driving part (6) for driving the stirring shaft (5) to rotate. The stirring shaft (5) is provided with stirring blades (7), which are located between the spray unit (2) and the aluminum plate assembly (3). The filter unit (4) is used to intercept solid particles generated by the reaction.

2. The continuous crude indium extraction apparatus according to claim 1, characterized in that: The tank (1) is provided with a first blocking plate (9) arranged radially therein. The cavity above the first blocking plate (9) is the reaction zone, and the cavity below the first blocking plate (9) is the filtration zone (101). The reaction area is provided with a reaction cylinder (8) spaced apart from the tank (1). The reaction cylinder (8) abuts against the first blocking plate (9). A cavity with an open top is formed inside the reaction cylinder (8). A liquid inlet space is formed between the reaction cylinder (8) and the tank (1). The bottom of the reaction cylinder (8) is formed with several conical holes, and the liquid inlet (12) is connected to the liquid inlet space.

3. The continuous crude indium extraction apparatus according to claim 2, characterized in that: The reaction cylinder (8) has an inwardly recessed spiral groove (801) formed inside, and the spiral groove (801) is spiraled from bottom to top to the top. The liquid gradually rises from the bottom of the reaction cylinder (8) to the top of the reaction cylinder (8) until the aluminum plate assembly (3) is in the liquid.

4. The continuous crude indium extraction apparatus according to claim 3, characterized in that: The stirring shaft (5) includes a drive shaft (501) connected to the power output end of the first drive unit (6), and a bushing (502) pivotally connected to the outside of the drive shaft (501). The aluminum plate assembly (3) includes a support plate (301) sleeved on the outside of the bushing (502), an aluminum plate (302) connected to the upper part of the support plate (301) and in the shape of a fan, and a plurality of the aluminum plates (302) are evenly distributed around the outside of the drive shaft (501). The thickness of the aluminum plate (302) varies in a wedge shape along its radial direction, so that some of the aluminum plates (302) have a corrugated structure.

5. The continuous crude indium extraction apparatus according to claim 3, characterized in that: The aluminum plate (302) has a contoured opening, and a first scraper (303) communicating with the drive shaft (501) is provided in the opening. A second scraper (304) is also provided above the aluminum plate (302), and the second scraper (304) is elastically connected above the aluminum plate (302) through a connecting component.

6. The continuous crude indium extraction apparatus according to claim 4, characterized in that: A fixing plate (305) is also connected to the drive shaft (501). The fixing plate (305) extends radially along the support plate (301) and is disposed above the aluminum plate (302). Two abutting shafts (306) are respectively provided at both ends of the fixing plate (305). An elastic element (307) is sleeved on the abutting shaft (306). The abutting shaft (306) includes a limiting section, a main body section and a pressing section located above the aluminum plate (302). The elastic element (307) is disposed between the pressing section and the fixed plate (305), and the diameter of the pressing section is larger than the maximum diameter of the elastic element (307); A second scraper (304) is connected between the two pressure sections.

7. The continuous crude indium extraction apparatus according to claim 6, characterized in that: The spray unit (2) includes a ring-shaped mounting bracket (201) connected inside the tank (1), a drive assembly (204) disposed inside the mounting bracket (201), and a plurality of atomizing nozzles (202) disposed at the output end of the drive assembly (204). While the drive assembly (204) drives the plurality of atomizing nozzles (202) to move radially back and forth along the aluminum plate (302), the atomizing nozzles (202) oscillate and spray. The mounting bracket (201) is also provided with an annular spray pipe (203), which is connected to the atomizing nozzle (202).

8. The continuous crude indium extraction apparatus according to claim 7, characterized in that: The drive assembly (204) includes a fixed base (2041) connected to the mounting bracket (201), a turntable (2043) pivotally connected to the fixed base (2041), a second drive unit (2044) connected to the mounting bracket (201), and a linkage assembly (2042) connected to the power output end of the second drive unit (2044), the linkage assembly (2042) being pivotally connected to the turntable (2043); The atomizing nozzle (202) is slidably connected to the fixed base (2041), the second driving part (2044) drives the turntable (2043) to rotate, and a plurality of the atomizing nozzles (202) move radially along the tank (1).

9. The continuous crude indium extraction apparatus according to claim 8, characterized in that: The fixed base (2041) has a plurality of sliding grooves (20411) formed on it, and a sliding block (212) is provided in the sliding groove (20411). An extension plate is provided below the sliding block (212). The extension plate is connected to the nozzle mounting part, and the atomizing nozzle (202) is connected to the nozzle mounting part.

10. The continuous crude indium extraction apparatus according to claim 8, characterized in that: The nozzle mounting part includes a mounting plate (206), a bearing (211) connected to the mounting plate (206), and a connecting rod (207) connected to the bearing (211). The atomizing nozzle (202) is connected to one end of the connecting rod (207), and a lever (208) is also connected to the connecting rod (207). The turntable (2043) and the connecting rod assembly (2042) are connected by a pin (209). The bottom of the mounting bracket (201) is also provided with a pivotally connected drive disk (205). The drive disk (205) is connected to the pin (209). The mounting bracket (201) is also provided with a limiting member (210) supporting the drive disk (205). Several limiting members (210) restrict the displacement of the drive disk (205). When the pin (209) rotates, the drive disk (205) rotates accordingly, and the connecting rod (207) swings relative to the mounting plate (206).

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